Incorrect quote language in multilingual assembly

When you build multilingual documentation ([ru, en]) with the --static-content flag, Russians get into the English documentation Notes

When you build only the English version with the --lang=en flag, there is no such problem

Reproduce the multilingual documentation build for ru and en with --static-content, then compare it with the English-only build using --lang=en. Trace the assembly path responsible for Notes language selection; done means Russian notes stay in the Russian documentation and do not appear in the English output.

Written by the indexing model from the issue text.